package com.yidao.common;

import java.awt.AlphaComposite;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.RenderingHints;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStream;

import javax.imageio.ImageIO;

import javax.swing.ImageIcon;

/**

* 图片加水印，设置透明度

* http://blog.csdn.net/hfmbook

* @author Gary

* 创建日期：2014年12月16日 22:45:17

*/

public class ImageMarkLogoByIcon {

/**

* @param args

*/

public static void main(String[] args) {

String srcImgPath = "c:/1111.png";

String iconPath = "c:/0439.jpg";

String targerPath = "c:/c.png" ;

// 给图片添加水印

ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath , -45);

}

/**

* 给图片添加水印

* @param iconPath 水印图片路径

* @param srcImgPath 源图片路径

* @param targerPath 目标图片路径

*/

public static void markImageByIcon(String iconPath, String srcImgPath,

String targerPath) {

markImageByIcon(iconPath, srcImgPath, targerPath, null) ;

}

/**

* 给图片添加水印、可设置水印图片旋转角度

* @param iconPath 水印图片路径

* @param srcImgPath 源图片路径

* @param targerPath 目标图片路径

* @param degree 水印图片旋转角度

*/

public static void markImageByIcon(String iconPath, String srcImgPath,

String targerPath, Integer degree) {

OutputStream os = null;

try {

Image srcImg = ImageIO.read(new File(srcImgPath));

BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),

srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);

// 得到画笔对象

// Graphics g= buffImg.getGraphics();

Graphics2D g = buffImg.createGraphics();

// 设置对线段的锯齿状边缘处理

g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,

RenderingHints.VALUE_INTERPOLATION_BILINEAR);

g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg

.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);

if (null != degree) {

// 设置水印旋转

g.rotate(Math.toRadians(degree),

(double) buffImg.getWidth() / 2, (double) buffImg

.getHeight() / 2);

}

// 水印图象的路径 水印一般为gif或者png的，这样可设置透明度

ImageIcon imgIcon = new ImageIcon(iconPath);

// 得到Image对象。

Image img = imgIcon.getImage();

float alpha = 0.2f; // 透明度

g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,

alpha));

// 表示水印图片的位置

g.drawImage(img, 150, 300, null);

g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));

g.dispose();

os = new FileOutputStream(targerPath);

// 生成图片

ImageIO.write(buffImg, "JPG", os);

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (null != os)

os.close();

} catch (Exception e) {

e.printStackTrace();

}

}

}

}